Acryloyl chloride thermal

Finally, another related study from the Sun laboratory concerned the synthesis of hydantoins utilizing acryloyl chloride to prepare a suitable polymer support [87]. All steps were carried out under reflux conditions in a dedicated microwave instrument utilizing 50-mL round-bottomed flasks. Identical reactions under classical thermal heating did not proceed in the same time period. 

Some results on thermal stability and thermal decomposition products of other acrylic acid derivatives including poly(a-chloro-acrylonitrile), poly(a-phenyl acrylonitrile), and poly(acryloyl chloride) as reported in literature are given in Table 6.7.17 [6]. 

Copolymers of acryloyl chloride with methyl methacrylate and styrene have been synthesized, compositional control has been achieved, and the acid chloride side groups have been successfully esterified with methyl-p-CD. One caveat to this method is the difficultly controlling the attachment of just one methyl-p-CD on the reactive side-group, since there are still many hydroxyl groups present on the methyl-P-CD. This then causes methyl-P-CD to act as a crosslinker reacting with several acid chlorides on the copolymer, thereby preventing the methyl-p-CD-incorporated material to be further processed via solution or thermal means. 

Copolymerisation reactions do not always succeed in the presence of phenols. Cardanol, converted to the acrylate (R = H) by reaction with acryloyl chloride, has been co-polymerised in the presence of benzoyl peroxide with methyl methacrylate leading to a product vrith improved thermal stability compared with polymethyl methacrylate alone (ref. 265). In a similar way an acrylate and a methacrylate (R = Me) have been synthesised from 3-pentadecylphenol. Polymerisation yielded moderately high molecular weight compounds of potential interest as pressure-sensitive adhesives (ref. 266). 

Preparation of homopolymers of the ortho- and para-acrylaminoarsonic acids by a radical polymerization of respective monomers was described by Pal and coworkers [143]. The monomers were synthesized by condensation of acryloyl chloride with corresponding arsenic acids. The thermal stability of both polymers was quite high. TGA measurements indicated that up to 205 °C they were losing only 7.7% of their weight. Thanks to the thermal stability and high ion exchange capacity of these... 

An early attempt to synthesize graft copolymers was performed by Smets et a/. A poly(methyl methacrylate) containing a few randomly distributed acryloyl chloride units is reacted with t-butyl hydroperoxide to form perester functions. Subsequently the polymer solution is heated in the presence of a second monomer, the polymerization of which is initiated by the thermal cleavage of the perester functions. The process yields both grafts (from the -C02 radicals located on the backbone) and homopolymer (from the RO radicals). Adequate fractionation is necessary to remove the latter constituent if pure graft copolymer is needed (Scheme 2). 

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